How to customize admin posts screen per post.
You can customize to columns for Posts list screen. This can be Drag&Drop column items to edit and reorder columns.
For do not have the columns
If do not have the columns, My WP is need register columns of Posts, so please refresh the columns.
Columns width deviation
For example to added the Excerpt column, this width is 100% because WordPress default.
But you can change the width of columns(for example to auto). 🙂
Bulk Updated Messages
This features is change the message for bulk update.
This features is hide specify items, change the number of posts for posts list.